Outward supply wrongly entered

NITIN DALSANIA (84 Points)

19 January 2021  
december quaterly gstr1 filed was correct but the same figure of gstr1 wrongly filed in monthly gstr 3b instead of monthly figure,

so oct, nov outward supply also shown in dec gstr3b again,

same as in itc claimed oct, nov itc again shown in december gstr3b,

what to do now, please suggest.